A pair of rare black rhinos, one with its horns removed as an anti-poaching measure, graze in the bush on a ranch belonging to John Hume, hotel magnate and rhino farmer, in South Africa, on Friday, Dec. 4, 2015. White and black rhinos were brought back from the brink of extinction in South Africa in the 1960s to a stable population of close to 20,000. Photographer: Waldo Swiegers/Bloomberg via Getty Images
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